where we can post our thoughts about music and artistsThat is what journals and shoutboxes are for

discuss in a realtime mode.I'm not totally sure what you mean (you used 'timeline' as if we're supposed to know what this is without explanation - only thing that comes to mind in this context is facebook, but facebook's 'timeline' has nothing to do with real-time discussions of anything). Are you talking about a facebook-style news feed? If so… not for me, thanks.

Yet it would be nice if activity could be more easily shared to Facebook. I really like how Spotify used the Facebook API - it would be cool if I could do the same from last.fm, as I find this service much more useful than Spotify.

And yes, I know all the arguments against sharing activity, but I happen to like it, and I am not alone. Having it available as an option would be cool and could stimulate further adoption of the last.fm platform

I'm not talking about making last.fm look like facebook but just simply setting a column next to our avatar where we can post things like "hey, Los Hermanos sounds great" even I can't understand any Portuguese!" and also integrate all of our activities in there.

Better Facebook Integration

I think a lot of people prefer to use Facebook for Social Networking and would like Last.FM to release an official facebook timeline app like Spotify or the other Music apps here http://www.facebook.com/about/timeline/apps